https://mynameisfeng.com Sharing knowledge and insights in 23+ languages. Technical articles, tutorials, and lessons learned while building. en-us Sun, 17 May 2026 05:29:52 GMT https://mynameisfeng.com/blog/why-ive-stopped-calling-it-vibe-coding https://mynameisfeng.com/blog/why-ive-stopped-calling-it-vibe-coding The creator of Claude Code wants to retire 'vibe coding.' His replacement — 'intent-driven development' — reveals something real about building AI agents that ship. Sat, 16 May 2026 17:30:27 GMT Feng Liu AI agents vibe coding intent-driven development Claude Code developer tools https://mynameisfeng.com/blog/how-one-founder-runs-14-saas-products-on-20-hours-a-week-and-where-ai-agents-actually-broke-down https://mynameisfeng.com/blog/how-one-founder-runs-14-saas-products-on-20-hours-a-week-and-where-ai-agents-actually-broke-down One founder runs 14 SaaS products on 20 hours/week using Claude agents — until they reported a fake 40% revenue surge. Here's the real architecture. Thu, 14 May 2026 17:57:40 GMT Feng Liu AI agents solopreneur SaaS bootstrapping automation https://mynameisfeng.com/blog/claude-code-vs-cursor-vs-windsurf-in-2026-an-honest-breakdown-for-solo-founders https://mynameisfeng.com/blog/claude-code-vs-cursor-vs-windsurf-in-2026-an-honest-breakdown-for-solo-founders Claude Code vs Cursor vs Windsurf in 2026 — an honest breakdown of pricing, use cases, and the new billing landscape for solo founders and AI builders. Thu, 14 May 2026 17:04:40 GMT Feng Liu AI coding tools Claude Code Cursor Windsurf building in public solo founder https://mynameisfeng.com/blog/the-multi-model-ai-workflow-how-solopreneurs-cut-coding-costs-without-losing-quality https://mynameisfeng.com/blog/the-multi-model-ai-workflow-how-solopreneurs-cut-coding-costs-without-losing-quality In 2026, the smartest solopreneurs aren't picking one AI model — they're routing between several. Here's the multi-model workflow that cuts costs by 100x. Tue, 12 May 2026 17:14:09 GMT Feng Liu solopreneur AI tools multi-model AI DeepSeek Claude Code AI cost optimization indie hacker https://mynameisfeng.com/blog/the-real-cost-of-claude-code-what-the-usage-limits-are-actually-telling-you https://mynameisfeng.com/blog/the-real-cost-of-claude-code-what-the-usage-limits-are-actually-telling-you Reverse engineer Claude Code's real cost: KV cache mechanics, idle session penalties, and why Uber burned its 2026 AI budget in four months. Sun, 10 May 2026 12:10:46 GMT Feng Liu Claude Code AI tools developer productivity LLM cost agentic coding https://mynameisfeng.com/blog/ai-agent-persistent-memory-why-key-value-stores-fail-in-production https://mynameisfeng.com/blog/ai-agent-persistent-memory-why-key-value-stores-fail-in-production The naive approach to AI agent memory breaks in real codebases. Here's why key-value stores fail and what production-grade agentic memory actually requires. Thu, 30 Apr 2026 17:46:17 GMT Feng Liu AI agents agent architecture developer tools Claude Code LLM engineering https://mynameisfeng.com/blog/claude-code-vs-cursor-vs-windsurf-what-2-weeks-of-real-work-actually-reveals https://mynameisfeng.com/blog/claude-code-vs-cursor-vs-windsurf-what-2-weeks-of-real-work-actually-reveals Two weeks comparing Claude Code, Cursor, and Windsurf on real projects. Here's which tool wins for which task — and why GPT-5.5 changes the calculus. Wed, 29 Apr 2026 17:21:17 GMT Feng Liu AI tools Claude Code Cursor Windsurf vibe coding developer tools https://mynameisfeng.com/blog/ai-solopreneur-tech-stack-in-2026-what-actually-works-at-scale https://mynameisfeng.com/blog/ai-solopreneur-tech-stack-in-2026-what-actually-works-at-scale The AI solopreneur tech stack in 2026: model tiering, vibe coding security traps, cost discipline, and the full architecture that actually works at scale. Tue, 28 Apr 2026 17:28:17 GMT Feng Liu AI solopreneur tech stack vibe coding indie hacker AI SaaS https://mynameisfeng.com/blog/ai-agent-architecture-tutorial-why-fully-autonomous-agents-failed-and-what-comes-next https://mynameisfeng.com/blog/ai-agent-architecture-tutorial-why-fully-autonomous-agents-failed-and-what-comes-next The developer community has reached consensus: fully autonomous AI agents failed. Here's the architecture that comes next — steerable agents with self-maintaining knowledge bases. Tue, 28 Apr 2026 11:11:23 GMT Feng Liu AI agents agent architecture Claude Code agentic AI developer tools https://mynameisfeng.com/blog/the-portfolio-of-bets-strategy-how-solo-founders-hit-1m-arr-without-a-unicorn https://mynameisfeng.com/blog/the-portfolio-of-bets-strategy-how-solo-founders-hit-1m-arr-without-a-unicorn The portfolio of bets startup strategy: how Marc Lou hit $1M ARR across multiple micro-SaaS — and the kill signals solo founders should use to decide when to double down. Sat, 25 Apr 2026 08:56:24 GMT Feng Liu portfolio of bets startup strategy solo founder micro-saas build in public https://mynameisfeng.com/blog/i18n-nextjs-ai-translation-how-i-ship-a-23-language-blog-as-a-solo-founder https://mynameisfeng.com/blog/i18n-nextjs-ai-translation-how-i-ship-a-23-language-blog-as-a-solo-founder How I ship a 23-language blog as a solo founder using Next.js, next-intl, and an AI translation pipeline — with 90% less manual work. Wed, 22 Apr 2026 13:09:16 GMT Feng Liu i18n Next.js AI translation SEO solo founder localization https://mynameisfeng.com/blog/claude-system-prompt-reverse-engineering-what-512000-lines-of-leaked-code-reveals https://mynameisfeng.com/blog/claude-system-prompt-reverse-engineering-what-512000-lines-of-leaked-code-reveals Anthropic's Claude Code leaked 512k lines of TypeScript. Here's what the architecture reveals about building reliable AI products — and what solo founders can steal from it. Sat, 18 Apr 2026 07:14:34 GMT Feng Liu AI Claude LLM Engineering Building in Public https://mynameisfeng.com/blog/i-built-an-ai-co-founder-heres-why https://mynameisfeng.com/blog/i-built-an-ai-co-founder-heres-why I kept building apps nobody wanted. The code was fine — the ideas were wrong. So I built a tool that stress-tests startup ideas the way a VC would. Tue, 24 Mar 2026 08:32:11 GMT Feng Liu ai co-founder startup idea validation stress-test startup ideas market research mvp development https://mynameisfeng.com/blog/the-complete-guide-to-writing-agent-system-prompts-lessons-from-reverse-engineering-claude-code https://mynameisfeng.com/blog/the-complete-guide-to-writing-agent-system-prompts-lessons-from-reverse-engineering-claude-code I decompiled Claude Code's system prompt, studied DeepAgents' source, and built my own AI agent from scratch. Most prompt guides are vibes. Fri, 20 Mar 2026 16:17:34 GMT Feng Liu ai agent system prompts prompt engineering guide claude code system prompt building ai agents llm prompt optimization https://mynameisfeng.com/blog/why-micromanaging-your-ai-agents-actually-makes-them-dumber https://mynameisfeng.com/blog/why-micromanaging-your-ai-agents-actually-makes-them-dumber Developers are treating modern LLMs like fragile regex scripts. By replacing rigid rules with core principles, you can massively improve your AI agents. Here is why less is actually more. Thu, 12 Mar 2026 08:14:24 GMT Feng Liu ai agents prompt engineering llm system prompts ai agent optimization reasoning engines https://mynameisfeng.com/blog/launch-less-is-launch-more-why-micro-shipping-is-your-only-moat-in-2026 https://mynameisfeng.com/blog/launch-less-is-launch-more-why-micro-shipping-is-your-only-moat-in-2026 The days of building in stealth for months are over. In an era where AI writes 90% of your code, your competitive advantage isn't what you build—it's how fast you dare to face reality. Wed, 11 Mar 2026 03:28:02 GMT Feng Liu micro-shipping building in stealth startup launch strategy competitive moat rapid product iteration https://mynameisfeng.com/blog/its-not-ai-taking-your-jobits-the-developer-next-door https://mynameisfeng.com/blog/its-not-ai-taking-your-jobits-the-developer-next-door The fear of AI replacing developers is misplaced. The real threat? The engineer who turns a 10-person team into a 2-person powerhouse. Here's the new reality of software. Wed, 25 Feb 2026 04:41:08 GMT Feng Liu ai replacing developers future of software engineering ai coding assistants developer productivity software leverage https://mynameisfeng.com/blog/why-nobody-buys-until-it-hurts-lessons-from-a-termite-infestation https://mynameisfeng.com/blog/why-nobody-buys-until-it-hurts-lessons-from-a-termite-infestation I struggled to get my landlord to pay for pest control until I stopped talking about bugs and started talking about structural rot. Here is why users ignore your product until you target their fear, greed, or image. Sat, 14 Feb 2026 08:43:00 GMT Feng Liu customer pain points sales psychology strategies buyer motivation value proposition examples overcoming sales objections https://mynameisfeng.com/blog/how-to-build-an-i18n-ai-powered-modern-webapp-in-2026 https://mynameisfeng.com/blog/how-to-build-an-i18n-ai-powered-modern-webapp-in-2026 Complete guide to building multilingual webapps with Lingui + AI translations. Support 17 languages automatically using Next.js, Claude, and T3 Turbo. Sat, 24 Jan 2026 05:00:55 GMT Feng Liu next.js internationalization ai-powered i18n lingui js tutorial automate translations with llm t3 turbo stack https://mynameisfeng.com/blog/the-10-mvp-cycle-automating-the-journey-from-idea-to-deployment https://mynameisfeng.com/blog/the-10-mvp-cycle-automating-the-journey-from-idea-to-deployment Stop writing boilerplate. I’ve found a workflow using Claude, Linear, and Vercel that turns PRDs into deployed apps automatically. Here's how to build 10 startups at once. Sat, 10 Jan 2026 13:54:28 GMT Feng Liu vibe coding automated mvp workflow claude linear vercel ai coding agents rapid startup deployment https://mynameisfeng.com/blog/the-death-of-the-single-bet-how-ai-turns-founders-into-vcs https://mynameisfeng.com/blog/the-death-of-the-single-bet-how-ai-turns-founders-into-vcs Stop spending 6 months on one idea. With AI leverage, the math of startups has changed. Here's how to execute the 'Me as a VC' strategy and build a portfolio of bets instead of a single product. Sat, 10 Jan 2026 13:13:06 GMT Feng Liu ai startup strategy portfolio of bets venture capital mindset founder leverage startup validation https://mynameisfeng.com/blog/the-portfolio-founder-why-you-should-launch-10-mvps-not-one https://mynameisfeng.com/blog/the-portfolio-founder-why-you-should-launch-10-mvps-not-one VCs win by placing hundreds of bets. Founders usually risk it all on one. AI changes this equation. Here is how to use agents and vibe coding to turn your startup journey into a probability game. Fri, 26 Dec 2025 08:18:22 GMT Feng Liu portfolio founder launch multiple mvps ai startup agents vibe coding vc power law https://mynameisfeng.com/blog/building-your-first-ai-agent-a-practical-guide-with-langchain https://mynameisfeng.com/blog/building-your-first-ai-agent-a-practical-guide-with-langchain Most AI agent tutorials skip the messy parts. Here's how I built a working agent with LangChain, tRPC, and PostgreSQL - including the mistakes I made along the way. Fri, 19 Dec 2025 07:09:28 GMT Feng Liu langchain ai agent tutorial build ai agent next.js trpc drizzle postgresql google gemini integration full-stack ai development https://mynameisfeng.com/blog/the-end-of-the-app-engineer-why-the-next-10-years-belong-to-builders-of-agents https://mynameisfeng.com/blog/the-end-of-the-app-engineer-why-the-next-10-years-belong-to-builders-of-agents We are standing at a historical pivot point comparable to 1999 or 2009. The era of building static apps is fading; the era of autonomous agents is here. If you can't build an agent that makes decisions, you might be obsolete sooner than you think. Fri, 19 Dec 2025 06:58:12 GMT Feng Liu ai agent engineer autonomous agents future of software engineering building ai agents app development trends https://mynameisfeng.com/blog/how-to-build-a-chatbot-with-t3-turbo-gemini https://mynameisfeng.com/blog/how-to-build-a-chatbot-with-t3-turbo-gemini Most founders get stuck in 'setup hell.' I just built a fully type-safe AI chatbot in an afternoon. Here's the exact stack—Next.js, tRPC, and Gemini—and the code to do it yourself. Fri, 12 Dec 2025 17:27:04 GMT Feng Liu build ai app t3 turbo stack google gemini api next.js trpc tutorial rapid mvp development https://mynameisfeng.com/blog/one-startup-is-gambling-ten-is-mathematics https://mynameisfeng.com/blog/one-startup-is-gambling-ten-is-mathematics Success isn't about the cards you're dealt; it's about how many hands you play. Here is why treating your career like a poker algorithm transforms fear into a probability game. Fri, 12 Dec 2025 08:44:08 GMT Feng Liu startup success entrepreneurship mindset business probability founder advice startup execution https://mynameisfeng.com/blog/the-era-of-vibe-everything-why-hard-work-just-changed-forever https://mynameisfeng.com/blog/the-era-of-vibe-everything-why-hard-work-just-changed-forever Work is shifting from execution to intention. We're moving from coding to 'vibing'—telling AI what we want and letting it handle the rest. Here is how the one-person unicorn will be built. Sun, 07 Dec 2025 06:48:18 GMT Feng Liu vibe coding vibe economy one-person unicorn ai execution barrier future of work ai https://mynameisfeng.com/blog/the-portfolio-founder-how-ai-turned-me-into-my-own-vc https://mynameisfeng.com/blog/the-portfolio-founder-how-ai-turned-me-into-my-own-vc The traditional startup math—2 years of funding, 4 pivots—is dead. With AI leverage, you don't need 3 months to test an idea; you need a weekend. Here is how to validate 10 ideas in parallel and become your own investor. Sun, 07 Dec 2025 06:23:54 GMT Feng Liu ai for startups validate startup ideas parallel entrepreneurship product-market fit ai leverage https://mynameisfeng.com/blog/the-ai-golden-age-why-you-should-stop-pitching-vcs https://mynameisfeng.com/blog/the-ai-golden-age-why-you-should-stop-pitching-vcs I used to think I needed a seed round to build anything real. Then AI changed the math. Here's why 10x leverage and high willingness to pay means you can finally skip the VC circus. Sun, 07 Dec 2025 03:33:59 GMT Feng Liu bootstrapping vs vc ai startup leverage solo founder tips stop pitching vcs startup unit economics